Pendugaan Sebaran Lindi di Sekitar TPA Bakau Besar Kabupaten Mempawah Menggunakan Metode Potensi Diri
DOI:
https://doi.org/10.23887/jstundiksha.v12i1.45735Kata Kunci:
bakau besar, lindi, potensial diri, tempat pembuangan akhirAbstrak
Lindi merupakan cairan yang merembes pada tumpukan sampah dan sekaligus dapat membawa bahan-bahan terlarut yang dihasilkan dari proses dekomposisi sampah tersebut. Sebaran lindi dapat menyebabkan pencemaran pada air tanah di sekitar Tempat Pembuangan Akhir (TPA). Penelitian ini bertujuan untuk memetakan sebaran lindi di sekitar TPA Bakau Besar Kabupaten Mempawah. Identifikasi aliran lindi dilakukan berdasarkan sebaran nilai potensial di permukaan bumi dengan menggunakan metode self-potential (SP). Pengukuran dilakukan dengan konfigurasi fixed-base menggunakan 2 buah elektroda, 1 buah elektroda berada di titik referensi (base) dan elektroda lainnya berpindah-pindah di sepanjang lintasan (rover) untuk mengukur nilai potensial di titik pengukuran. Pengukuran di lapangan mengaplikasikan 6 lintasan dengan panjang masing-masing 150 m, jarak antar lintasan sebesar 10 m, dan jarak elektroda sebesar 10 m. Hasil penelitian menunjukkan bahwa nilai potensial alami yang diperoleh sebesar -17,5 mV hingga 12,86 mV. Akumulasi aliran lindi diinterpretasi memiliki nilai potensial yang relatif lebih rendah. Nilai potensial tinggi terdapat di bagian utara, sedangkan nilai potensial rendah terdapat di bagian selatan lokasi penelitian. Dengan demikian, aliran lindi diduga terakumulasi pada arah selatan yang berdekatan dengan TPA Bakau Besar.
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